.tutorial-hero {
  position: relative;
  overflow-x: clip;
  border-bottom: 1px solid var(--color-border);
  background: var(--color-bg);
}

.tutorial-hero::before {
  position: absolute;
  top: -20%;
  right: -8%;
  width: min(58vw, 820px);
  height: min(58vw, 820px);
  border-radius: var(--radius-pill);
  background: var(--gradient-halo);
  content: "";
  pointer-events: none;
}

.tutorial-hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  align-items: center;
  gap: clamp(38px, 7vw, 88px);
  padding-top: clamp(42px, 7vw, 86px);
  padding-bottom: clamp(34px, 6vw, 72px);
}

.tutorial-hero-copy {
  max-width: 680px;
}

.tutorial-hero-copy h1 {
  margin-bottom: 20px;
}

.tutorial-hero-copy .lede {
  margin-bottom: 28px;
}

.tutorial-route {
  position: relative;
  box-shadow: var(--shadow-card);
  transform: rotate(-1deg);
}

.route-list {
  display: grid;
  gap: 0;
  list-style: none;
}

.route-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 16px;
  padding-bottom: 16px;
}

.route-list li:first-child {
  border-top: 0;
  padding-top: 0;
}

.route-list li:last-child {
  padding-bottom: 0;
}

.route-index {
  display: grid;
  width: 42px;
  height: 42px;
  flex-shrink: 0;
  place-items: center;
  border-radius: var(--radius-block);
  background: var(--gradient-accent);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
  box-shadow: var(--shadow-button);
}

.route-list strong,
.route-list span {
  display: block;
}

.route-list strong {
  font-family: var(--font-display);
  font-size: 16px;
}

.route-list li div > span {
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 13px;
}

.platform-guide {
  position: relative;
  display: flex;
  align-items: center;
  gap: 16px;
  border-top: 1px solid var(--color-border);
  padding-top: 22px;
  padding-bottom: 4px;
}

.platform-guide-label {
  flex-shrink: 0;
  color: var(--color-muted);
  font-size: 13px;
  font-weight: 700;
}

.tutorial-width {
  max-width: calc(1040px + var(--gutter) * 2);
}

.tutorial-toc {
  margin-top: 22px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.section-heading h2 {
  margin-bottom: 14px;
}

.prepare-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.prepare-grid .card {
  display: flex;
  flex-direction: column;
}

.prepare-grid h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.prepare-grid p {
  color: var(--color-muted);
}

.prepare-mark {
  display: grid;
  width: 34px;
  height: 34px;
  margin-bottom: 18px;
  place-items: center;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  background: var(--color-panel-warm);
  color: var(--color-accent-ink);
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 700;
}

.prepare-callout {
  margin-top: 20px;
}

.tutorial-step {
  display: grid;
  grid-template-columns: 76px minmax(0, 1fr);
  gap: clamp(22px, 4vw, 48px);
}

.step-rail {
  position: relative;
}

.step-rail::after {
  position: absolute;
  top: 58px;
  bottom: 0;
  left: 25px;
  width: 1px;
  background: var(--color-border);
  content: "";
}

.step-number {
  position: sticky;
  top: 20px;
  z-index: 1;
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border-radius: var(--radius-block);
  background: var(--gradient-accent);
  color: var(--color-bg);
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  box-shadow: var(--shadow-button);
}

.step-content {
  max-width: 78ch;
}

.step-content h2 {
  margin-bottom: 24px;
}

.step-content > p {
  color: var(--color-text);
}

.step-content > p + p {
  margin-top: 18px;
}

.step-content p a {
  color: var(--color-accent-ink);
}

.tutorial-band {
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  background: var(--color-panel);
}

.mini-interface,
.mode-demo,
.connection-choices,
.verify-grid,
.step-content > .callout,
.checkpoint {
  margin-top: 28px;
  margin-bottom: 28px;
}

.mini-note {
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 12px;
}

.import-interface {
  max-width: 620px;
}

.mode-demo {
  display: flex;
  align-items: center;
  gap: 24px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-bg);
  padding: 22px;
  box-shadow: var(--shadow-soft);
}

.mode-explanation {
  border-left: 1px solid var(--color-border);
  padding-left: 24px;
}

.mode-explanation p {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 14px;
}

.checkpoint {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-block);
  background: var(--color-panel-warm);
  padding: 18px 20px;
}

.checkpoint-dot {
  width: 10px;
  height: 10px;
  margin-top: 7px;
  flex-shrink: 0;
  border-radius: var(--radius-pill);
  background: var(--color-success);
}

.checkpoint p {
  margin-top: 4px;
  color: var(--color-muted);
}

.connection-choices {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.connection-choices .card {
  display: flex;
  flex-direction: column;
}

.connection-choices .card > p {
  margin-top: 12px;
  color: var(--color-muted);
}

.connection-choices .setting-row {
  margin-top: auto;
  padding-top: 14px;
}

.choice-head {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.choice-head h3 {
  margin-right: auto;
}

.verify-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  overflow: hidden;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-card);
  background: var(--color-bg);
  box-shadow: var(--shadow-soft);
}

.verify-item {
  padding: 22px;
}

.verify-item + .verify-item {
  border-left: 1px solid var(--color-border);
}

.verify-item h3 {
  margin-top: 14px;
  font-size: 18px;
}

.verify-item p {
  margin-top: 9px;
  color: var(--color-muted);
  font-size: 14px;
}

.verify-status {
  display: inline-flex;
  border-radius: var(--radius-pill);
  padding: 5px 10px;
  font-size: 12px;
  font-weight: 750;
}

.verify-status.is-good {
  background: var(--component-success-soft);
  color: var(--color-success);
}

.verify-status.is-warn {
  background: var(--component-warning-soft);
  color: var(--color-text);
}

.verify-status.is-error {
  background: var(--component-error-soft);
  color: var(--color-error);
}

.after-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.after-grid h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.after-grid p {
  color: var(--color-muted);
}

.tutorial-next {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 30px;
  margin-top: 36px;
}

.tutorial-next h2 {
  font-size: clamp(24px, 3vw, 34px);
}

.tutorial-next p {
  max-width: 62ch;
  margin-top: 10px;
  color: var(--color-muted);
}

.tutorial-next .button-row {
  justify-content: flex-end;
}

@media (max-width: 900px) {
  .tutorial-hero-grid {
    grid-template-columns: 1fr;
  }

  .tutorial-route {
    max-width: 680px;
    transform: none;
  }

  .prepare-grid,
  .verify-grid {
    grid-template-columns: 1fr;
  }

  .verify-item + .verify-item {
    border-top: 1px solid var(--color-border);
    border-left: 0;
  }

  .tutorial-next {
    grid-template-columns: 1fr;
  }

  .tutorial-next .button-row {
    justify-content: flex-start;
  }
}

@media (max-width: 700px) {
  .platform-guide {
    align-items: flex-start;
    flex-direction: column;
  }

  .tutorial-step {
    grid-template-columns: 1fr;
  }

  .step-rail {
    height: 52px;
  }

  .step-rail::after {
    display: none;
  }

  .step-number {
    position: static;
  }

  .connection-choices,
  .after-grid {
    grid-template-columns: 1fr;
  }

  .mode-demo {
    align-items: stretch;
    flex-direction: column;
  }

  .mode-explanation {
    border-top: 1px solid var(--color-border);
    border-left: 0;
    padding-top: 18px;
    padding-left: 0;
  }
}

@media (max-width: 640px) {
  .tutorial-hero::before {
    top: 8%;
    right: -30%;
    width: 620px;
    height: 620px;
  }

  .tutorial-hero-grid {
    padding-top: 34px;
  }

  .tutorial-route {
    padding: 20px;
  }

  .route-list li {
    gap: 12px;
  }

  .route-index {
    width: 38px;
    height: 38px;
  }

  .platform-guide-label {
    white-space: normal;
  }

  .mode-demo,
  .checkpoint {
    padding: 16px;
  }

  .mode-demo .mock-modes {
    width: 100%;
  }

  .mode-demo .mock-mode {
    flex: 1;
    text-align: center;
  }

  .tutorial-next .button-row {
    width: 100%;
  }
}